1. How is carbon-free sand separated from the lift gas?
a) Gravity
b) Pumping air
c) Flooding water
d) All of the mentioned
Explanation: Since they are heavier than lift gas, they settle down at the bottom.
2. What was the modification made by BASF for thermal cracking of crude oil?
a) Dual usage
b) Generates heat
c) Cracks crude oil
d) All of the mentioned
Explanation: BASF developed a single fluidized bed with dual purpose of heating and cracking crude oil.
3. What is the alternate for sand as a heat carrier?
a) Silica alumina
b) Coal
c) Ash
d) Saw dust
Explanation: Silica alumina have high specific heat and high thermal conductivity.
4. Considering the usage of two separate sections for heat generation and crude cracking provides advantage on which process?
a) Air can be used instead of oxygen
b) More oxygen can be utilized
c) No need of any air or oxygen supply
d) None of the mentioned
Explanation: Because there is no need for direct contact of oxygen as required for crude cracking, air can be used directly for heating purpose.
5. How many generators are required for generating 40,000 tons of ethylene/year?
a) 1
b) 2
c) 3
d) 4
Explanation: They used 2 generators for producing 40,000 tons of ethylene/year.
6. What kind of designs were proposed for extracting oil from rocks?
a) In situ extraction
b) Moving bed processes
c) Fluidized bed
d) All of the mentioned
Explanation: They are suggested in order to provide oil economically.
7. At what temperature is the retort maintained in the fluidized bed for oil recovery?
a) 370-530 C
b) 120-250 C
c) 700-900 C
d) None of the mentioned
Explanation: It is optimum temperature for evaporation of oil.
8. How is oil shale recovered from the fluidized plant?
a) Cooling the steam
b) Heating the oil
c) Filtration of steam
d) All of the mentioned
Explanation: On condensation, the shale gets separated from the steam and then collected at the bottom
9. What is the important factor in the overall economics of recovery of shale?
a) Efficient heat recovery
b) Efficient oil recovery
c) Efficient coal recovery
d) All of the mentioned
Explanation: They are important for best overall economics.
10. A four-stage pilot plant was developed having _______ capacity of feed in order to get high yields of oil?
a) 45 kg/hr
b) 65 kg/hr
c) 20 kg/hr
d) 50 kg/hr
Explanation: Optimum feed for best oil yield.